package com.hj.util;

import android.app.Activity;
import android.util.Log;

import java.util.Stack;

public class AppManager {
    private static Stack<Activity> activityStack;

    private static AppManager instance;

    private AppManager() {
    }

    /**
     * 单一实例
     */
    public static AppManager getAppManager() {
        if (instance == null) {
            instance = new AppManager();
        }
        return instance;
    }

    public void log() {
        for (int i = 0; i < activityStack.size(); i++) {
            Log.d("AppManager", "ClassName: " + activityStack.get(i).getLocalClassName());
        }
    }

    public int getSize() {
        return activityStack.size();
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack<>();
        }
        activityStack.add(activity);
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        if (activityStack != null && activityStack.lastElement() != null) {
            Activity activity = activityStack.lastElement();
            return activity;
        }
        return null;
    }

    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        if (activityStack != null && activityStack.lastElement() != null) {
            Activity activity = activityStack.lastElement();
            finishActivity(activity);
        }
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null) {
            if (activityStack != null) {
                activityStack.remove(activity);
            }
            activity.finish();
            activity = null;
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        try {
            for (int i = 0, size = activityStack.size(); i < size; i++) {
                if (null != activityStack.get(i) && activityStack.get(i).getClass().equals(cls)) {
                    activityStack.get(i).finish();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        if (activityStack != null) {
            for (int i = 0, size = activityStack.size(); i < size; i++) {
                if (null != activityStack.get(i)) {
                    activityStack.get(i).finish();
                }
            }
            activityStack.clear();
        }
    }

    /**
     * 除了指定activity外
     * 结束所有Activity
     */
    public void finishAllActivity(Activity act) {
        try {
            if (activityStack != null) {
                String name = act.getClass().getName();
                for (int i = 0, size = activityStack.size(); i < size; i++) {
                    if (null != activityStack.get(i) && activityStack.get(i).getClass().getName().equals(name)) {
                        activityStack.get(i).finish();
                    }
                }
                activityStack.clear();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    public boolean hasActivity(Class<?> cls) {
        try {
            for (int i = 0, size = activityStack.size(); i < size; i++) {
                if (null != activityStack.get(i) && activityStack.get(i).getClass().equals(cls)) {

                    return true;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

    /**
     * 退出应用程序
     */
    @SuppressWarnings("deprecation")
    public void AppExit() {
        try {
            finishAllActivity();
            System.exit(0);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
